Artificial Food Particles for your Teeth
Remember the times when people where looking down on everbody who had a tatoo?
Well, the same is probably true when someone discovers that the remainders of the salad you had for lunch are still sticking to your front tooth. But this is only a problem for prejudiced people. In the near future, this will be a priviledge: people will be able to choose color and shape of the food particles that are sticking to their teeth. Of course, since the food particles are artificial, they will not only serve as a decoration, but they will also protect your teeth from caries.
Reward: Free artificial food particles whenever I need them.